Kaprekar numbers: Difference between revisions
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SqrtNegInf (talk | contribs) m (→Numeric version (medium): added '.race' for concurrency) |
m (→{{header|REXX}}: changed a comment (box), changed output section title.) |
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=={{header|REXX}}== |
=={{header|REXX}}== |
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<lang rexx>/*REXX pgm generates & counts (+ maybe shows) some Kaprekar #s using the cast─out─9 test*/ |
<lang rexx>/*REXX pgm generates & counts (+ maybe shows) some Kaprekar #s using the cast─out─9 test*/ |
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/* |
/*╔═══════════════════════════════════════════════════════════════════╗ |
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║ Kaprekar numbers were thought of by the mathematician from India, ║ |
║ Kaprekar numbers were thought of by the mathematician from India, ║ |
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║ Shri Dattathreya Ramachardra Kaprekar (1905 ───► 1986). ║ |
║ Shri Dattathreya Ramachardra Kaprekar (1905 ───► 1986). ║ |
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╚═══════════════════════════════════════════════════════════════════╝*/ |
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parse arg A B . /*obtain optional arguments from the CL*/ |
parse arg A B . /*obtain optional arguments from the CL*/ |
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if A=='' | A="," then A= 10000 /*Not specified? Then use the default.*/ |
if A=='' | A="," then A= 10000 /*Not specified? Then use the default.*/ |
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if aN>0 then call tell 1 /*unity is defined to be a Kaprekar #. */ |
if aN>0 then call tell 1 /*unity is defined to be a Kaprekar #. */ |
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/* [↑] handle case of N being unity.*/ |
/* [↑] handle case of N being unity.*/ |
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if aN>1 then do j= |
if aN>1 then do j=9 for aN-9; s=j*j /*calculate the square of J (S). */ |
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if j//9==s//9 then do k=1 for length(s)%2 /*≡ casted out 9's?*/ |
if j//9==s//9 then do k=1 for length(s)%2 /*≡ casted out 9's?*/ |
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parse var s L +(k) R |
parse var s L +(k) R |
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/*──────────────────────────────────────────────────────────────────────────────────────*/ |
/*──────────────────────────────────────────────────────────────────────────────────────*/ |
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tell: #=#+1; if N>0 then say right(arg(1), digits()); return /*maybe display it*/</lang> |
tell: #=#+1; if N>0 then say right(arg(1), digits()); return /*maybe display it*/</lang> |
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{{out|output|text= when using the default inputs of: <tt> 10000 -1000000 </tt>}} |
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<pre> |
<pre> |
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1 |
1 |
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